PI6C :4 24MHz Clock Buffer. Description. Features. Applications. Block Diagram. Pin Configuration (16-Pin TSSOP) 16-pin (173 mil) TSSOP
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1 Features ÎÎSupport XTAL or Clock input at 24MHz ÎÎFour buffered outputs support V DDO operation ÎÎVery low phase jitter(rms) : < 1.5ps (max) ÎÎVery low additive jitter: <300fs (typ) ÎÎ3.3V supply voltage for Core ÎÎ1.8V ~ 3.3V supply voltage for two output banks ÎÎPackaging: 16-pin TSSOP ÎÎCommercial & Industrial Temperature support Description The PI6C is a low jitter clock buffer supporting either XTAL or reference input. Two of its outputs can support wide operating voltage from 1.8V to 3.3V. It is a cost effective way to generate multiple outputs for all kinds of applications that need 24MHz with different power supplies. Applications ÎÎNetworking Systems ÎÎFemtocell BTS ÎÎPeripheral Block Diagram Pin Configuration (16-Pin TSSOP) X1/CLKIN X2 Crystal Oscillator VDD V DDO1 CLK1 CLK2 CLK3 CLK4 X1/ICLKIN V DD V DD V DD02 CLK4 OE# X2 V DD CLK1 CLK2 V DDO1 CLK3 OE# V DDO2 16-pin (173 mil) TSSOP 1
2 Pin number Pin Name Type Description 1 X1/CLKIN Input Crystal connection or clock input 2, 4, 14 V DD Power Supply voltage 3.3V 5 V DDO2 Power Supply voltage from 1.8V to 3.3V for CLK3 and CLK4 6 CLK4 Output Clock Output 4 7, 9, 15 Power Connect to Ground 8 OE# Input Global output enable when low. Internal pull-down resistor. 10 CLK3 Output Clock Output 3 11 V DDO1 Power Supply voltage from 1.8V to 3.3V for CLK1 and CLK2 12 CLK2 Output Clock Output 2 13 CLK1 Output Clock Output 1 16 X2 Output Crystal connection Function Table OE# CLK1/CLK2/CLK3/CLK4 0 Enabled 1 Hi-Z, weak pull down 2
3 Maximum Ratings (Above which useful life may be impaired. For user guidelines, not tested.) Storage Temperature C to +150 C Ambient Temperature with Power Applied ºC to+85ºc Supply Voltage to Ground Potential, V DD V to +4.6V ESD Protection (HBM) V Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Power Requirements(Over operating free-air temperature range) Symbol Parameter Min. Typ. Max. Units V DD Power Supply Voltage V V DDO Power Supply Voltage for outputs V I DD Power supply current, no load 5 ma T A Ambient Operating Temperature C t UP Power Supply Ramp Time 4 ms DC Electrical Characteristics Symbol Parameter Condition Min. Typ. Max. Units V IH Input High Voltage CLKIN, OE# V DD/2+1 V V IL Input Low Voltage CLKIN, OE# V DD/2-1 V V OH Output High Voltage I OH = -8mA V DDo 0.4 V V OL Output Low Voltage I OL = 8mA 0.4 V Z O Nominal Output Impedance 20 W R PD C IN Internal Pull-down Resistor OE# 170 CLKIN 220 kw Input Capacitance OE# 4 CLKIN 7.5 pf 3
4 AC Electrical Characteristics (Note 4) Symbol Parameter Conditions Min. Typ. Max. Units F IN Input Frequency Fundamental Crystal 24 MHz Input Clock 24 MHz t R Output Rise Time 20% to 80% 24MHz, Note 1 1 ns t F Output Fall Time 80% to 20% 24MHz, Note 1 1 ns t DC Duty Cycle % J phase Clock Phase Jitter (RMS) 24MHz, Note ps J add Additive Jitter 24MHz, Note fs 1. Note 1: Measured with 7 pf lump load. 2. Note 2: 12 khz to 20 MHz offset frequency using a crystal input. 3. Note 3: CLKIN input with X2 floating. 4. Note 4: Do not drive this device without a crystal or valid clock input 0.1µF 0.1µF VDD OUTPUTS VDD CLK out CLOAD CMOS Test Configuration 4
5 Crystal Oscillator Circuit X1 C1 24pF Crystal (C L = 16pF) X2 C2 24pF Typical Crystal Requirement Parameter Minimum Typical Maximum Units Mode of Oscillation Fundamental Frequency 24 MHz Equivalent Series Resistance (ESR) 50 Ω Shunt Capacitance 7 pf Drive Level 1 mw Recommended Crystal Specification Pericom recommends: a) FL , SMD 3.2x2.5(4P), 24MHz, CL=18pF, -20~70C, +/-20ppm, b) FL , SMD 3.2x2.5(4P), 24MHz, CL=18pF, -40~85C, +/-20ppm, b) FY , SMD 5x3.2(4P), 24MHz, CL=18pF, -20~70C, +/-30ppm, For other crystal options, please contact Pericom sales. Thermal Information Symbol Description Condition Q JA Junction-to-ambient thermal resistance Still air 84.0 O C/W Q JC Junction-to-case thermal resistance 17.0 O C/W 5
6 Packaging Mechanical: 16-Pin TSSOP (L) DATE: 05/03/12 Notes: 1. Refer JEDEC MO-153F/AB 2. Controlling dimensions in millimeters 3. Package outline exclusive of mold flash and metal burr DESCRIPTION: 16-Pin, 173mil Wide TSSOP PACKAGE CODE: L DOCUMENT CONTROL #: PD-1310 REVISION: F Ordering Information Ordering Code Package Code Package Type Operating Temperature PI6C490094LE L Pb-free & Green, 16-pin TSSOP Commercial PI6C490094LIE L Pb-free & Green, 16-pin TSSOP Industrial Notes: Thermal characteristics can be found on the company web site at E = Pb-free and Green X suffix = Tape/Reel Pericom Semiconductor Corporation
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